There may be something going on, sure. But it's far from a fact. I remember with mortal kombat, they never showed it, and it was coming soon. Alot of people were saying the same things as with doom eternal. I think this will be the same situation. They're not focusing on it publicly because it's not going to sell more than any of the other versions. PC, xbox, and ps4 is what they will talk about, show, etc... so until Bethesda says otherwise, it's coming when they said it was.
Mortal Kombat 11 was, just as Youngblood, available for preorder on Switch since it was announced. Also, while they were recluctant to show gameplay footage on Youtube, they brought the game to PAX and people atending the event were able to play the game and give their impressions. We had prove that the game actually existed.
Do we have any tangible prove that DOOM Eternal on Switch is real? I mean, besides Bethesda saying that it was coming to the Switch like... a year and a half ago? Because that's the only thing we have. They haven't said anything about it since then.